Simple but sexy in stripes: Diane Kruger is effortlessly stylish in eye-catching shorts and a studded T-shirt

She is known for dazzling in the most beautiful of garments, but Diane Kruger proves that she can make even the most casual of outfits look like haute couture.

The 37-year-old German actress and model was spotted returning to her car after grabbing a spot of lunch at The Oaks Gourmet Market in Los Feliz, Los Angeles, on Friday.

Diane, who is best known for her role as Helen in Troy, was dressed in an effortlessly chic pair of striped loose-fitted Ann Taylor shorts, a silver studded white T-shirt and a pair of Ancient Greek Sandals 'Clio Mix' flats.

Effortlessly chic: Diane Kruger encapsulated the laid-back summer look in a pair of striped shorts, sandals and T-shirt as she went out for a bite to eat at The Oaks Gourmet Market in Los Feliz.

She teamed the outfit with an oversized maroon handbag, whilst shading her eyes in a pair of brown sunglasses and carried a large carton of 'Boxed Water Is Better.'

Her long blonde locks were left out and naturally tousled and wore very little make-up exposing her flawless skin.

Diane recently starred in the film adaptation of Stephenie Meyer's novel The Host, which was released in March, 2013 and is now filming American drama and television series The Bridge in Los Angeles which debuted on FX on July 10, 2013.

Fed and watered: Diane heads back to her car after lunch whilst holding a Boxed Water is Better carton

The series stars Diane as a detective with Aspergers syndrome who teams up with a Mexican counterpart in a bid to find a serial killer striking on both sides of the border.

Her Mexican co-star Demián Bichir, 50, has also become a big hit on the show and the pair have been spotted regularly laughing and joking on set.

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Demián plays Detective Marco Ruiz, who is fighting corruption in the ruff Mexican state of Chihuahua as he battles to crack the case.

Lapping up the sunshine: Diane is now filming in LA but normally splits her time between Paris and Vancouver.

But there is no need for Diane's fiancé Joshua Jackson, who she has been dating since 2006, to be jealous despite speculation over wedding plans.

The former Dawson's Creek star, 35, hinted they may never get married, and also said previously marriage isn’t necessarily important for him and Diane - despite the model seen with a gold ring on her index finger on Friday.

Joshua told ET Canada that he and Kruger are not walking down the aisle and said: 'No, we're not engaged,' whilst holding up his ring-less hands.

'I'm not sure, in the modern world, that that's the track that we're taking.'

Enjoying each other's company: Diane and Joshua have been dating since 2006 and set up home together in Canada